A resistor connected in parallel with a galvanometer so that a large amount of current can be measured is called a/an
Aammeter
Bavometer
Ccoil resistor
Dmultiplier
Eshunt.
View Explanation & Discuss
Question 2
neco2004
The relative density of dilute tetraoxosulphate (vi) acid in a battery is measured with a
Abarometer
Bhydrometer
Cmanometer
Dhypsometer
View Explanation & Discuss
Question 3
neco2004
Calculate the energy stored in an inductor of inductance 0.5H when a current of 3A flows through it.
A15.00 J
B9.45 J
C6.00 J
D4.50J
E2.25 J
View Explanation & Discuss
Question 4
neco2004
A ray of light experiences a minimum deviation when passing through an equilateral triangular glass prism. Calculate the angle of incidence of the ray. [Refractive index of glass = 1.5]
A300.0°
B48.6°
C60.0°
D75.5°
E105.0 °
View Explanation & Discuss
Question 5
neco2004
The resultant of two forces P and Q is least when the angle between them is
A0°
B45°
C60°
D90°
E180°
View Explanation & Discuss
Question 6
neco2004
If the distance between the plates of a parallel plate capacitor is decreased, its capacitance
Abecomes zero
Bdecreases
Cincreases
Dis halved
Eremains the same
View Explanation & Discuss
Question 7
neco2004
A radioactive isotope has a half-life of 8 days. What fraction of the atoms will remain after 72 days?
A9.766 × 10-4
B1.736 ×10-3
C1.953 ×10-3
D3.472 × 10-3
E3.906 x 10-3
View Explanation & Discuss
Question 8
neco2004
Which of the following is used as a depolarizer in a Denial cell?
AAmmonium chloride
BCopper (II) tetra Oxo sulphate (VI) solution
CManganese (IV) oxide
DTetraoxo sulphate (VI) acid
EWater
View Explanation & Discuss
Question 9
neco2004
Emission spectra are caused by
Akinetic energy of moving atoms
Bpotential energy of an electron in an atom
Ctransition of an electron from a higher energy level to a lower energy level
Dtransition of an electron from a lower energy level to higher energy level
Etransition of excited protons in the nucleus.
View Explanation & Discuss
Question 10
neco2004
A current flows in a series circuit containing a resistor, R, an inductor, L and a capacitor, C. Which of the following is true of the power dissipated in the circuit component(s)?
AThe power dissipated in L is greater than zero
BThe power dissipated in R is zero
CThe sum of the power dissipated in L and C is equal to that in R
DThe sum of the power dissipated in L and C is greater than in R
EThe sum of the power dissipated in L and C is zero
View Explanation & Discuss
Question 11
neco2004
When the same amount of current, I is passed through different wires under the same conditions, the rates of production of heat are
Adirectly proportional to I
Bdirectly proportional to the resistances of the wires
Cdirectly proportional to the square of the resistances of the wires
Dinversely proportional to I
Einversely proportional to the resistance of the wires
View Explanation & Discuss
Question 12
neco2004
A car travels with a constant velocity of 45 kmh-1 for 20s. What distance does it cover in this time?
A0.025m
B0.250m
C2.500m
D25.000m
E250.000m
View Explanation & Discuss
Question 13
neco2004
Heat
I. is a form of energy
II. is measured with a thermometer
III. cannot be created or destroyed
IV. from a hot object is transferred through conduction only. Which of the statements above are correct?
AI and II only
BI and III only
CI, II and III only
DII, III and IV only
EI, II, III and IV
View Explanation & Discuss
Question 14
neco2004
In which of the following are crystalline structures observable?
I. Gas
II. Liquid
III. Solid
AI only
BII only
CIII only
DI and III only
EII and III only
View Explanation & Discuss
Question 15
neco2004
The rate of diffusion of gases increases with increase(s) in
I. density
II. temperature
III, mass. Which is/are correct?
AI only
BII only
CI and II only
DII and III only
EI, II and III
View Explanation & Discuss
Question 16
neco2004
A stone is dropped from the top of a tower of height 11 .25m. Calculate the time it will take to reach the ground. [g = 10ms-2]
A1.00s
B1.50s
C2.25s
D2.50s
E3.00s
View Explanation & Discuss
Question 17
neco2004
A body has masses of 0.013kg and 0.012 kg in oil and water respectively. If the relative density of oil is 0.875 calculate the mass of the body.
A0.02 kg
B0.03kg
C0.04kg
D0.05kg
E0.06kg
View Explanation & Discuss
Question 18
neco2004
What is the uncertainty in the measurement of time, if the uncertainty in measuring the energy of an electron of mass 10-30 kg is 2.45 × 10-19J? h = 6.6 × 10-34
A1.35 ×10-15s
B2.69 × 10-15s
C4.15 × 10-15s
D9.05 × 10-15s
E1.62 × 10-14s
View Explanation & Discuss
Question 19
neco2004
Calculate the wavelength of light travelling with a speed of 3 × 108ms-1 and a frequency of 6.2 × 1014Hz.
A4.8 × 10-8m
B4.8 × 10-7m
C4.8 × 10-6m
D4.8 × 10-5m
E4.8 × 10-4m
View Explanation & Discuss
Question 20
neco2004
A surface in the path of an advancing wave on which all the particles are in the same state of disturbance is called a
